Nanoscale Hotspot-Induced Emitters in DNA Origami-Assisted Nanoantennas
Ayşe Tuğça Mina Yeşilyurt, Xiaofei Wu, Kosti Tapio, Ilko Bald, Jer‐Shing Huang
Abstract
We report the observation of hotspot-induced emitters and photoluminescence enhancement of up to 42-fold from DNA origami-assisted plasmonic dimer nanoantennas upon excess polarized laser illumination. The presence of DNA and laser polarization alignment along the dimer axis are critical for the generation of bright emitters responsible for the observed PL increase. The emission spectrum reveals characteristic Raman peaks of amorphous carbon, suggesting the formation of carbon-based emitters in the nanoantenna due to the plasmonic hotspots at the longitudinal antenna resonance.
Topics & Concepts
PlasmonChemistryPhotoluminescenceRaman spectroscopyNanoscopic scaleDNA origamiDimerPolarization (electrochemistry)Hotspot (geology)OptoelectronicsCarbon nanotubeLaserNanotechnologyOpticsDNAMaterials sciencePhysicsOrganic chemistryBiochemistryGeophysicsPhysical chemistryPlasmonic and Surface Plasmon ResearchAdvanced biosensing and bioanalysis techniquesGold and Silver Nanoparticles Synthesis and Applications